She goes to get changed

Kagami crossed her legs a little after using her padding again. She had already wet herself a few times during her training, and was starting to get uncomfortable. She eventually put her banto down and took a deep breath. "Mother, I need to go get changed. May I take a break to do so?" She asked, to which her mother nodded in approval. Unlike most people her age, Kagami was perfectly capable of changing herself, so she grabbed her diaper bag and headed to a nearby changing room designed for people like her. On the way there, she ran into someone else, who probably needed a change as well.